腘窝囊肿 guówōnángzhǒng Baker's cyst Origin Definitions Defs Strokes Stroke Words Sentences Sents 腘窝 膕窩 guówō hollow of the knee the hollow area at the back of the knee; popliteal space囊肿 囊腫 nángzhǒng cyst a pouch-like growth with a distinct membrane containing fluid or semi-solid material, occurring in organs such as the liver, kidneys, or ovaries; usually benign